3美国胸科协会
(原标题: 3 ATs)
2024-05-04
浏览次数: 16
尽管他们和R2D2很像，但这三个人并不是你要找的机器人。取而代之的是位于智利阿塔卡马沙漠地区帕拉纳天文台的1.8米辅助望远镜（ATs）。ATs设计用于干涉测量，这是一种实现极高分辨率观测的技术，与天文台的8米甚大望远镜单元相配合。总共有四个at是可操作的，每个都装有一个传送器，可以沿着轨道移动望远镜，允许不同的阵列与大型望远镜单位。作为干涉仪，每台望远镜发出的光通过地下隧道中的镜子系统汇聚到一个共同的焦点上。在这三个at之上，大麦哲伦云和小麦哲伦云是我们银河系遥远的卫星星系。在晴朗而黑暗的南方天空中，地球淡绿色的大气辉光沿着地平线隐约延伸。
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Despite their resemblance to R2D2, these three are not the droids you're looking for. Instead, the enclosures house 1.8 meter Auxiliary Telescopes (ATs) at Paranal Observatory in the Atacama Desert region of Chile. The ATs are designed to be used for interferometry, a technique for achieving extremely high resolution observations, in concert with the observatory's 8 meter Very Large Telescope units. A total of four ATs are operational, each fitted with a transporter that moves the telescope along a track allowing different arrays with the large unit telescopes. To work as an interferometer, the light from each telescope is brought to a common focal point by a system of mirrors in underground tunnels. Above these three ATs, the Large and Small Magellanic Clouds are the far, far away satellite galaxies of our own Milky Way. In the clear and otherwise dark southern skies, planet Earth's greenish atmospheric airglow stretches faintly along the horizon.
© Yuri Beletsky